02-09-09: Richard_stacyRight. That's what I thought when I went to the Theta website to read up on the Casablanca. Multichannel input is limited to SP/DIF, AES/EBU, and optical digital multichannel. These digital links don't have the bandwidth to pass along lossless multichannel data. And the Casablanca's analog input is limited to stereo pairs.
the analog input card is 6 stereo rca inputs for line level analog output devices,
So no, your Theta Casablanca can't decode, nor even pass along the lossless multichannel surround schemes from Blu-ray.